saving colormap

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Namrata
Namrata 2011-3-29
below are the commands I am using:
cmap = contrast(Grayscale_Image,100);
colormap(cmap);
The resulting colormap is needed to be saved as an image for further processing on it.Is there any way to do so?

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回答（1 个）

Walter Roberson
Walter Roberson 2011-3-29
ImageWidth = 20;
cmapimg = repmat(reshape(cmap,size(cmap,1),1,3), 1, ImageWidth, 1);
Now use your favorite image writing routine on cmapimg. The result will be a vertical stripe of colors ImageWidth pixels wide with the rows all the same color. (That is, to store it as an image, you really only need a single pixel of each color, but that is hard for humans to see, so this code broadens it out to ImageWidth identical pixels.)

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